Our APS® systems feature state-of-the-art Class-D Digital amplifiers, the latest innovation in amplifier technology! Class-D provides significant improvements in quality and performance over previous classes of amplification, whilst increasing efficiency to 82%. This major gain in amplifier efficiency enables running costs and space required by the Class-D amplifier to be reduced by around 50%. As an additional benefit, Voice Alarm systems based on Class-D will require far smaller emergency backup power supplies, giving further savings in both space and cost. Our new Class-D top-flight technology guarantees 100% continuous output at full load!